Perhaps you should try some spelling variations:
"dose factor" » "noise factor", "one factor", "mode factor", "dose factors", "dosone factor", "dosage factor", "dosex factor", "dose factr", "dos5 factor"
"e factor" » "e factors", "one factor", "age factor", "ex factor", "e factr", "5 factor"
"de facto" » "dex facto", "de fact", "d5 facto", "de faito", "e facto", "de falcoo"
"e facto" » "ex facto", "e fact", "5 facto"
"de fact" » "de fait", "e fact", "de falco"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("e factor") OR ("dose factor"))) OR ((("de facto") OR ("e facto"))))) OR ("de fact"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"e factor\") or (\"dose factor\"))) or (((\"de facto\") OR (\"e facto\"))))) or (\"de fact\"))*".
• Removing quotes may allow a broader search: (((((( e factor ) or ( dose factor ))) or ((( de facto ) OR ( e facto ))))) or ( de fact ))*.